Machine for pulverizing clay for making brick



(No Model.)

W; ANDRES. I ,MAGHINE 'POR P U LVBRIZ ING CLAY FOR MAKING BRICK. No. 276,147.

Patent ed Apr. 24, 1888.

{1/ I v WWW UNITED STATES PATENT OFFICE.

WVILLIAM ANDRUS, 0F KEOKUK, IOWA.

MACHINE Foe PULVERIZING CLAY FOR MAKING BRICK.

SPECIFICATION forming part of Letters Patent No. 276,147, dated April 24,

Application filed December 6, 1882. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM ANDRUS, a citizen of the United States, residing at Keokuk, in the county of Lee and State of Iowa, have invented certain new and useful Improvements in Machines for Pulverizing Clay for MakingBrick; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to theaccompanying drawing, and to the letters and figures of reference marked thereon, which forms a part of this specification.

This in velljlqllfhas for itvobject pulverizingIlry bT nearly dry clay for making brick;

and it consists in a grinding apparatus and a steel-wire-brush pulverizer, which are made as shown and set forth.

The drawing shows a vertical cross section of the apparatus.

The main frame E bears the several working parts set in suitable hearings, in the relations shown.

The grinding-rolls B B differ in the diameter of their gear-wheels b b, so that one turns faster than the other, to give a peculiar effect to the clay compressed between them. The clay is fed to them from hopper K by means of a four-wing roller, A, above them, as shown, which breaks the clods and lumps and pushes it downward, and it. is crushed and ground between the rolls, escaping below in fine dust and in granules and flattened flakes, which do not compact nicely into brick in that condition. This clay falls into ahopper, G, below, so as to enter chamber 0, which has perforated walls. In this chamber is cylinder 0, clothed with a steel-wire brush close to the side walls, which is turned very rapidly to thoroughly break up and pulverize the hard flakes from the rolls. Thefincly-divided clay is driven through screen-like perforations in the walls of chamber 0, which are formed of sheet metal or wirecloth, and falls into a third hopper below, from which it is removed by a screw-conveyer, D, or by an elevator or any other means, for use as desired. inder U is formed of metal disks held together securely, holding between them stitt' springsteel wires extending outward all around to the perforated walls to form brushes. The effect of this brush is varied by varying the size and length of the wires of which it is made, and by varying the speed at which it is driven, as well as by varying the size 01" perforations in the surrounding walls.

The effect of the apparatus is .to thoroughly pulverize and intermix the clay, and cover all damp particles with dry dust, so it will handle and work easily and freely, and will till the molds well and with a uniform quantity of clay, and so it will form a solid compact brick, with a nice firm and even surface and mass.

Several modifications of structure and of use may be made. The brush may be operated without the rolls, and the separatingscreen can be replaced by bars forming their equivalents, besides others.

I am aware that rotary brushes have been used in cylinder-screens, as in smutting-rnills, and that such brushes have been used with crushing-rolls without screens, so I do not claim these features separately.

I claim- In a clay-pulverizer, the combination of the crushing or grinding rolls with the rotary brush mounted within the perforated cylinder or screen, having the opening 0', leading from the crushing-rolls into the screen, substantially as set forth.

In testimonywhereof I aflix my signature in presence of two witnesses.

WILLIAM ANDRUS.

Witnesses A. H. GARRETSON, J. G. GARRETsoN,

The cyl-. 

